U command, 22
UCS (User Coordinate Systems), 10
grid rotation, 56, 57
ordinate dimensions, 307
point coordinates, 329
solids rotation, 160–163, 161–162
working with, 164–165, 164
UCS icon, 10
UCS toolbar, 18
UCS II toolbar, 18
Underline tool, 266
Undo command, 22
Undo tool, 22, 38
with Modify menu, 127
for text, 266
undoing actions and Undo option, 22
Extend, 134
Pedit, 148
text edits, 266
Ungroup option, 245
union operation, 165–166, 165
Union tool, 165, 165
Unit Format option, 320–321
units
for blocks, 256
for dimensions, 320–323, 320–321
selecting, 44–47, 45
setting, 19
Units Format option, 321
Unlock Object's Layer tool, 222
Unnamed option, 244
Unstack tool, 266
updating xref files, 249, 249
Upper Value option, 323
Uppercase tool, 266
Upside Down option, 277
Use Background Mask option, 269
Use Color Dependent Plot Styles option, 362
Use Drawing Background Color option, 269
Use Overall Scale Of option, 314, 318
User Coordinate Systems. See UCS (User Coordinate Systems)
User Defined option, 86
user-defined paper sizes, 353